JPS586942B2 - Color printing separation plate proof reproduction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a proof printing apparatus for color printing separations for electrically combining images separated into several color printing separations and reproducing them as proofs on a color television monitor. This is related to the improvement of.

Generally, when printing an original image with tones, separated versions of four color elements, magenta, cyan, yellow, and black, are created from the original image, and these are used to print the original image. Color printing is performed.

Therefore, the quality of the separation plates is important in determining the quality of color printing.

For this reason, conventionally, a plurality of separation plates of the same type of color elements are produced, and the one with the best quality is selected and used.

Conventionally, a proof printing reproduction device for color printing separation plates, as shown in the block diagram of Figure 1, has been used to select and extract the separation plates of the best quality from a plurality of separation plates of the same type of color elements. .

This device extracts one arbitrary separated version from each of the separated versions of four types of color elements, and displays images of the extracted separated versions 1Y, 1C, 1M, and 1BL of the four types of color elements on a television camera. 2 converts it into an electrical signal, switches the switch 4 to the recording/playback devices 3Y, 3C, 3M, and 3BL provided corresponding to each color element and sequentially records the signal, and then performs color correction on the playback output of these recording/playback devices. After the circuit 5 synthesizes the images while approximating the proof print, the image is reproduced on the color television monitor 6 as a substitute image of the proof print.

Therefore, the quality of the separation plate is determined by observing a substitute image of the proof print reproduced on the color television monitor 6.

However, the problem with conventional color printing separation plate proof printing reproduction devices (hereinafter referred to as reproduction devices) that has such a function is that it is difficult to select which of the four types of separation plates arbitrarily extracted by the observer first. This makes it difficult to determine if there is a quality defect.

In other words, in the conventional reproducing apparatus shown in FIG. 1, it is possible to record only one image of each of the four types of separated plates.

In other words, it is not possible to record all the separated plates made of multiple sheets of each color element.

Therefore, if there is a quality defect in one of the four disassembled images that the observer arbitrarily selected at the beginning, the observer temporarily stores this first substitute image in his/her mind and Erase the image of one of the separated plates, record and play back the image of the second separated plate, observe the substitute image of the color-corrected proof, and compare it with the first substitute image stored in your brain.

By the way, human vision is generally able to easily distinguish minute changes in a specific image when it is continuously observing those images, but between looking at a specific image and the image that has changed. When viewing other images or when a certain amount of time passes, minute changes cannot be easily discerned.

For this reason, in the conventional reproducing apparatus, it is extremely difficult to select and extract which decomposed version in the end.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a proof printing reproduction apparatus for color printing separation plates that allows easy determination of the quality of the separation plates.

In order to achieve this purpose, the color printing separation plate proof printing reproduction apparatus according to the present invention has a recording and reproducing device provided corresponding to each color element, as well as an image recording and reproducing device for a second separation plate. At least one recording/playback device for recording and playback is provided, and the playback output of the second separated image and the first separated image are recorded on this newly installed recording/playback device. The recording/reproducing output and the recording/playback output can be instantly switched using a switch, so that alternate images can be continuously observed.

Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 2 is a block diagram showing an embodiment of the reproducing apparatus according to the present invention, and the same parts as in FIG. 1 are designated by the same symbols.

In the figure, the differences from the block diagram shown in Figure 1 are as follows:
Recording and reproducing devices 3Y, 3 provided corresponding to each color element
a recording/playback device 3AD that records and plays back a second separated image of any of the color elements in addition to C, 3M, and 3BL;
The playback output of this recording/playback device 3AD and the recording/playback device 3Y, 3
The main point is that switches 7Y, 7C, 7M, and 7BL are provided for switching the reproduction outputs of C, 3M, and 3BL, respectively.

In the reproducing apparatus configured in this way, recording and reproducing of the first separated version of each color element is performed in the same manner as in the prior art.

If the quality of the substitute image displayed on the color television monitor 6 based on the first disassembled version is inferior to the original image, the substitute image based on the first disassembled version and the second A comparison is made with a replacement image of an exploded version of the eye.

First of all, the second yellow disassembled version 1Y2 is the recording/playback device 3.
The data is recorded in AD, and playback is started on all recording/playback devices including this recording/playback device 3AD.

Then, the yellow separated image supplied to the color correction circuit 5, that is, the playback output of the recording/playback devices 3Y and 3AD is switched to the switch 7.
The image is switched instantly by Y, and the substitute image formed by the first separated plate 1Y and the substitute image formed by the second separated plate 1Y2 are compared.

As a result, if no change is observed in the quality of the substitute image, it is determined that there is a quality defect in one of the other three color separations.

Next, after erasing the yellow second separated image recorded on the recording/playback device 3AD, the cyan second separated image is recorded on the recording/playback device 3AD.

Then, all the recording/playback devices start playing again, and by instantly switching the switch 7C, the substitute images, that is, the cyan-colored first separated version and the second separated image, are produced by the playback outputs of the recording/playback device 3C and the recording/playback device 3AD. A replacement image of an exploded version of the eye is compared.

As a result, if no change is observed in the quality of the substitute image, it is found that one of the remaining two color separations has a quality defect.

Similarly, the images of the second separated version of black and magenta colors are recorded on the recording/reproducing device 3AD, and compared with the substitute image of the first separated version of black and magenta colors.

For example, assuming that a change has been observed in the substitute images of the first and second separated magenta sheets, switch 7M is repeatedly switched and the degree of change is continuously observed.
The substitute image formed by the first separated plate and the substitute image formed by the second separated plate are compared, and the separated image that is most similar to the original image is determined as the final magenta color separated image.

As described above, according to this embodiment, since the substitute images of the first and second separated plates can be instantly switched and observed continuously, it is extremely easy to judge whether the separated plates are good or bad.

Furthermore, the accuracy of the determination can be improved.

In this embodiment, only one recording/playback device is used to record the image of the second separated version, but the determination work can be further facilitated by providing two or more devices corresponding to each color element. At the same time, the time required for the determination work can be shortened.

As explained above, according to the recycling device of the present invention, it is possible to very easily determine the quality of color printing separation plates, and the accuracy of the judgment can be further improved. It has extremely excellent effects such as being able to prevent quality deterioration.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a conventional color printing separation plate proof reproduction apparatus, and FIG. 2 is a block diagram showing an embodiment of the configuration of a color printing separation plate proof reproduction apparatus according to the present invention. . 1Y, 1C, 1M, 1BL... Disassembled version, 2...
...Television camera, 3Y, 3C, 3M, 3B
L, 3AD...Recording/player, 4.7Y, 7C,
7M, 7BL...Switch, 5...Color correction circuit, 6...Color television monitor.

Claims (1)

[Claims] 1. In a proof print reproduction device for color printing separation plates that electrically combines images separated into several color printing separation plates and reproduces them as a proof print on a color television monitor,
In order to record and play back images of separated versions of each color element, in addition to a recording/player provided corresponding to the separated version of each color element, at least one recording/player and a playback output of the recording/player; It is characterized by comprising a switch that switches between the signal and the playback output signal of each recording/playback device provided corresponding to the separated version of each color element to supply the image signal of the color element to the color television monitor. A proof printing reproduction device for color printing separation plates.